
But only if we've ever got actual swap measurements (COGL_FEATURE_ID_TIMESTAMP_QUERY). If it's supported then we now drop to double buffering and get optimal latency on a burst of cursor-only updates. Closes: https://launchpad.net/bugs/2023363 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1441>